At what points in the model do the cars have maximum and minimum gravitational potential energy?

Explanation:

The gravitational potential energy is given by :

E = mgh

Here, mg is force acting on the car

h is height at which it is placed

It is directly proportional to the height or the position of the car. It means if the height is less then it will have minimum potential energy while if the height is more then it will have maximum potential energy.

hey , the answer is c

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s